by Marion Nestle

Currently browsing posts about: CDC(Centers for Disease Control)

Jun 13 2016

Annals of food safety: General Mills Flour

The CDC has started a page on the E. coli O121 (STEC O121) outbreak linked to General Mills flour:

In interviews, ill people answered questions about the foods they ate and other exposures in the week before they became ill. Sixteen (76%) of 21 people reported that they or someone in their household used flour in the week before they became ill. Nine (41%) of 22 people reported eating or tasting raw homemade dough or batter. Twelve (55%) of 22 people reported using Gold Medal brand flour. Three ill people reported eating or playing with raw dough at restaurants.

The CDC’s “At A Glance”

  • Case Count: 38
  • States: 20
  • Deaths: 0
  • Hospitalizations: 10
  • Recall: Yes
 Here’s the “epi curve”—the graph of when people became ill and how many.

It looks like cases are—or were—popping up one at a time.  There is always a reporting lag.

While waiting for more information, the CDC recommends:

  • Do not use, serve, or sell the recalled flours.
  • Do not eat raw dough or batter, whether made from recalled flour or any other flour.
  • Bake items made with raw dough or batter before eating them.
  • Do not taste raw dough or batter.
  • Do not serve raw dough to customers or allow children and other guests to play with raw dough.

But really. Gold Medal flour?  If flour is used for cooking or baking, the bacteria would be killed.

OK.  I totally get eating raw cookie dough.  I did plenty of that back in the day when I baked cookies for my kids, and they helped clean the bowl.  Eating raw cookie dough may sound disgusting, but the mix is truly delicious.

If you’ve never tried it, now is not a good time to start.  In 2009, there was a really nasty E. coli outbreak from eating pre-packaged raw cookie dough.

But eating or playing with raw dough in restaurants?   Is this common practice?  News to me.


May 12 2016

Chipotle’s food safety issues: the saga continues

Food Safety News continues to be incredulous at Chipotle’s apparent denial of responsibility for the safety of food served in its outlets.

For sure, what has happened at Chipotle restaurants is unusual—illnesses caused by multiple toxic microbes at multiple locations:

  • Seattle — E. coli O157:H7, July 2015, five sick people, source unknown;
  • Simi Valley, Calif. — Norovirus, August 2015, 234 people, source was sick employee;
  • Minnesota — Salmonella Newport, August and September 2015, 64 sick people, source was tomatoes but it remains unclear  at what point in the field-to-fork chain the pathogen was introduced;
  • Nine states — E. coli O26, began October 2015 and declared over Feb. 1, 55 sick people, source unknown, states involved are California, Delaware, Illinois, Kentucky, Maryland, Minnesota, New York, Ohio, Oregon, Pennsylvania and Washington; and
  • Three states — E. coli O26, began December 2015 declared over Feb. 1, five sick people, source unknown, states involved are Kansas, Oklahoma and Nebraska; and closing out in
  • Boston — Norovirus in December, 151 sickened.

Chipotle did the obvious right thing.  It brought on board the most experienced and highly regarded food safety experts: Mansour Samadpour (he has a food safety consulting company), James Marsden (to head up its food safety initiatives), Dave Theno (formerly of Jack in the Box) and David Acheson (former FDA food safety official).

Perhaps before they had time to weigh in, Chipotle’s counsel wrote a letter to the CDC complaining about the way the agency was conducting its investigation.

The CDC recently responded in no uncertain terms as Food Safety News discussed.

Food safety lawyer Bill Marler says:

My thought:  “In 23 years being involved with every major food illness outbreak in the US, I have never seen a company take on the CDC or public health in this manner.  Frankly, it is bizarre given that Chipotle was involved in multiple Salmonella, Norovirus and E. coli cases in 2015.  As the CDC states in its responsive letter, it has to protect the public health and that is what it did.”

His view of the score: CDC 1, Chipotle Lawyer 0.

Chipotle’s food safety consultants have their work cut out for them.  Let’s hope they figure out the problem and find ways to solve it—soon.

Aug 4 2015

Become a food-safety expert: Cilantro this time

On my 12th-floor Manhattan terrace, I grow cilantro every summer.  I like to have it handy.  And I know it’s local, organic, seasonal, and deer-free—and unlikely to be contaminated with Cyclospora.

Image result for cilantro

The CDC reports 358 people to be ill with Cyclospora, most likely because they ate cilantro imported from Mexico.

It doesn’t take much web surfing to find out anything you want to know about such problems.  I like to use three sources:



Bill Marler

Jun 8 2015

The Blue Bell ice cream recall: a roundup

I was interested to read Michael Taylor’s comments on the recall of Blue Bell ice cream contaminated with Listeria.  Mr. Taylor is Deputy FDA Commissioner for food safety.

This was an outbreak in which 10 people were hospitalized and three died.  The best place to begin on this is on the CDC website for the Blue Bell outbreak.  It provides excellent graphics summarizing the number of cases and where they occurred:

This outbreak was particularly awful because inspections had found severe violations of standard food safety procedures, yet the company ignored them.  The result: people died.

Mr. Taylor asks if this outbreak could have been prevented with better FDA regulation.  In 2010, Congress passed the FDA Food Safety Modernization Act (FSMA) but it’s taken time for the implementation.  Taylor says:

the preventive controls for human food rule, if finalized as proposed, would require that companies like Blue Bell have a written food safety plan, based on an analysis of likely hazards, and companies would have to show us that plan during inspections.Listeria monocytogenes is a classic example of a hazard that a company should be controlling. Under the proposed standards, companies would be required to have the right controls in place to minimize hazards and would have to verify that their controls are working.

But, he says, to implement the law, the FDA needs funding: “If we do not get the funding, we will lose momentum, and implementation will be badly disrupted.”

Congress, no doubt, will continue to keep the FDA on a short string.  No industry likes being regulated and the food industry fights regulation in every way it can.

The FDA needs to do more to ensure food safety but can’t without inspectors.

That leaves legal approaches.  For these, I go right to the websites of the Marler-Clark law firm, which specializes in food safety cases.

Here’s what Bill Marler and his colleagues have had to say about the Blue Bell case (most recent first and I may be missing some):

Marler-Clark is filling a critical regulatory gap by suing companies that cause foodborne illnesses and deaths.  But this is after-the-fact.

As Bill Marler has been pleading since 2007: please put me out of business.

Prevention would be much, much better.  Hence the need for more FDA resources.

Update, June 12: The CDC concludes its investigations and the FDA releases reports

Apr 18 2014

CDC’s food safety report card: no happy news

The CDC has just issued its latest report on foodborne illness and food safety progress from 2006 to 2013.

It’s report has a couple of frowny faces—Campylobacter and Vibrio cases are up—and nothing else has changed.

Nothing to smile about.

Laboratory diagnoses of other foodborne microbial illnesses are also rising.

Figure: Changes in incidence of laboratory-confirmed bacterial infections, United States, 2013 compared with 2006-2008 (data are preliminary). Yersinia = 7% decrease, Vibrio = 32% increase, STEC Non-O157  = 8% increase, STEC O157 = 16% increase, Shigella = 14% decrease, Salmonella = 9% decrease, Listeria = 3% decrease, Campylobacter = 2% increase

The food industry needs to do a better job of producing safe food.

Let’s hope the new food safety rules go into effect soon and get followed.

Jan 16 2014

Congress on curbing food marketing to kids: not a chance.

Congress can’t pass a farm bill but it has plenty of time to micromanage nutrition and health.  Buried in the pork-filled Consolidated Appropriations Act of 2014 (see Monday’s post) are some zingers.  Here’s one:


This refers to the ill-fated IWG report I’ve discussed previously. To recap:

  • Congress asked the FTC to examine the effects of food marketing to children and make recommendations.
  • The FTC, USDA, FDA, and CDC got together and produced a report recommending voluntary guidelines for marketing to children based on the nutritional quality of the foods.
  • I thought the guidelines were weak in addition to being voluntary (they allowed lots of junk foods to qualify).
  • The food industry disagreed, strongly, and went to Congress to object.
  • Congress caved in to industry pressure and said the report could not be released unless the FTC produced a cost-benefit analysis.
  • End of story.
  • Why Congress feels that it’s necessary to do this again is beyond me.

I suppose we should be glad our legislators are at least doing something.

As for the food industry’s role in all this: when food companies say they are doing everything they can to reduce marketing junk foods to kids, you now know what they really mean.

Sep 9 2013

Microbiology lesson: the latest news on Cyclospora

As an undergraduate at Berkeley, I majored in Bacteriology.  I haven’t worked in that field for decades, but the training makes me appreciate the terrific job the Centers for Disease Control and Prevention (CDC) does in providing education about food safety microbiology.

The CDC website is always a good place to start (another is food safety lawyer Bill Marler’s blog).

I thought of this as I was trying to find out what’s going on with the latest big outbreak of foodborne illness, this time due to Cyclospora.

The CDC’s Cyclospora website, updated frequently, keeps track of the numbers of cases—in this case, 641 as of September 3, with 41 hospitalizations—from 24 states.

Investigators traced cases in Iowa and Nebraska to a salad mix produced by Taylor Farms de Mexico.  But this mix is not linked to cases in Texas, which complicates the investigations.

As for the biology of Cyclospora: it’s a parasitic protozoa transmitted through feces.  The CDC provides this handy diagram of its life cycle:


Life cycle of Cyclospora cayetanensis

What are you supposed to do to prevent getting sick from Cyclospora?  The CDC says unhelpfully: “Consumers should continue to enjoy the health benefits of eating fresh fruits and vegetables as part of a well-balanced diet.”

Everyone, it says, should follow safe produce handling recommendations.

Translation: Wash your veggies!

May 8 2012

The latest pet food Salmonella recall

A reader writes:

Here’s what I don’t understand.

Everyone who is scared of raw says they want their dog’s food to be cooked, to kill salmonella.

But here is kibble, which by definition is cooked to the point of losing most of its original nutrients, but STILL has salmonella.

I don’t see how this is possible.  If it’s cooked enough to be “kibbled,” how can it possibly still have salmonella? It just seems like the worst of all possible worlds.

This question refers to the recent recall of dry dog food manufactured by Diamond Pet Foods.

As the CDC explains, Michigan public health officials found Salmonella in an unopened bag of a Diamond kibble product during routine testing.  This particular Salmonella strain had been found to infect at least 14 people.

CDC investigators connected the dots between the illnesses and dog food through interviews:

Seven of 10 (70%) ill persons interviewed reported contact with a dog in the week before becoming ill.

Of 5 ill persons who could recall the type of dog food with which they had contact, 4 (80%) identified dry dog food produced by Diamond Pet Foods that may have been produced at a single facility in South Carolina.

In my book, Pet Food Politics: The Chihuahua in the Coal Mine, I tell the story of the massive pet food recalls of 2007 due to contamination with the industrial chemical, melamine.  And in Feed Your Pet Right, my co-authored book about the pet food industry, I explain how pet foods are manufactured and why they are so subject to contamination and recall.

Canned pet foods are sterile.  Dry kibble is not.  It may be sterile at the point of extrusion, but it is a perfect growth medium for bacteria.  It is nutritionally complete.  Although some nutrients are lost during processing, the product formulas compensate for such losses.  That is why dogs can survive on “complete and balanced” dry foods.

If the factory is contaminated with Salmonella, the bacteria can fall into the production lines and get packaged into the kibble bags.

Dogs are relatively resistant to Salmonella and usually do not show signs of illness from eating contaminated kibble.

But humans who handle the food or the dog can acquire the bacteria and get sick.

This makes dry dog food a potentially hazardous product, one best kept away from people with weak immune systems such as young children and the elderly.

People like feeding dry food to pets because it is convenient and cheap.

My point in Pet Food Politics was that pet food is an indicator of problems in food safety regulation.  If pet foods are not forced to be produced under strict food safety measures, humans and the human food supply are also at risk.


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